Fire Reducing Pipe

Reducing pipe is a kind of pipe fitting which is used for pipe tapering. Usually, the forming process is reducing diameter pressing, expanding diameter pressing or reducing diameter pressing plus expanding diameter pressing. In addition to using steel pipe as raw material to produce reducing pipe, some reducing pipes of specifications can also be produced by using steel plate stamping forming process. The shape of the punching die used for drawing is designed according to the surface size of the reducing pipe, and the steel plate after blanking is pressed and stretched into shape with the punching die. A closed loop of pipe connections.It is mainly used for oil and gas gathering and transportation networks in oil and gas fields, water supply and gas distribution networks in cities, etc.The reliability of the pipeline is higher than that of the branch pipe network, and the future transmission will not be interrupted due to a fault, but the total length of the pipeline has been increased.At each node of the pipe network, the outflow volume is equal to the flow volume.Reducing pipe (size head) is a type of pipe fitting used at pipe sizing.The usual forming process is reducing diameter pressing, expanding diameter pressing or reducing diameter plus expanding diameter pressing. 1. Reduced/expanded diameter forming The reducing diameter forming process of reducing pipe is to put the pipe blank with the same diameter as the big end of the reducing pipe into the forming die and press along the axial direction of the pipe blank to make the metal move along the die cavity and shrink forming.According to the size of reducing pipe, it can be divided into one pressing forming or several pressing forming.The following figure is the drawing diagram of concentric reducer. Expanding diameter forming is the tube billet with the diameter smaller than the big end diameter of the reducing pipe, and the tube billet is formed by expanding the diameter along the inner diameter of the tube billet with the inner die.The expanding process mainly solves the problem that the reducing pipe with large diameter is not easy to be formed by reducing diameter. In the process of reducing or expanding the diameter, according to different materials and changing the diameter, the cold or hot pressing is adopted.Under normal circumstances, as far as possible to use cold pressure, but for many times to change the diameter and cause serious work hardening, wall thickness thick or alloy steel materials should be used hot pressure. 1. Stamping In addition to using steel pipe as raw material to produce reducing pipe, for some specifications of reducing pipe can also be produced by steel plate using stamping forming process.The shape of the drawing die is designed according to the surface size of the reducing tube. Folding structure characteristics The reducing pipe is made of carbon steel and alloy steel. The stainless steel is represented by the large diameter multiplied by the small diameter multiplied by the thickness. Reducing pipe standard: national standard American standard British standard and a variety of non-standard high pressure stamping. The reducing diameter forming process of the reducing pipe is to put the tube blank with the diameter equal to the big end of the reducing pipe into the forming die, and through pressing along the axial direction of the pipe blank, make the metal move along the die cavity and contract forming. According to the size of the reducing pipe, it can be divided into one pressing forming or multiple pressing forming. The characteristics of reducing pipe are that the strength is significantly higher than that of carbon steel with the same amount of carbon. Fold the application 1. When the flow rate of the fluid in the pipeline changes, such as increasing or decreasing, and the flow rate requirements change little, the reducer shall be used. 2. At the entrance of the pump, reducing pipe is needed to prevent cavitation. 3, with the instrument, such as the flow meter, regulating valve joint, in order to cooperate with the instrument joint, also need to use reducing pipe.

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